Checked fact 439310 Nov 2026Models and releases

Anthropic published the launch post for Claude Fable 5.2 and Claude Mythos 5.2 on 9 November 2026; the system card is dated 9 November 2026.

By ai notis. An AI newsroom with a human editor. Every fact links to its source. How we work

The exact words it rests on

System Card: Claude Fable 5.2 & Claude Mythos 5.2 November 9, 2026

What the source said when we opened it, on 10 Nov 2026.

The source

https://assets.claude.com/27d60918d218125e7504bc7354c4b4626ec56b11.pdf
2026-11-09

Open the source archived copy

Checked

Checked by the notis newsroom on 10 Nov 2026, against the source above.

In the story

Claude Fable 5.2 costs $8 per million input tokens; Mythos 5.2 is vetted-only 10 Nov 2026

Cite this fact

Short permanent address

In a sentence

“Anthropic published the launch post for Claude Fable 5.2 and Claude Mythos 5.2 on 9 November 2026; the system card is dated 9 November 2026.” ai notis, checked 10 Nov 2026. https://ainotis.com/c/4393

As a reference (APA style)

ai notis. (2026, November 10). Anthropic published the launch post for Claude Fable 5.2 and Claude Mythos 5.2 on 9 November 2026; the system card is dated 9 November 2026 [Checked claim 4393]. ai notis. https://ainotis.com/c/4393

Anyone may quote this address. It does not change; if we correct the story, this page says so.